Metal - Modified CeO2 and ZrO2 Catalysts for Nitric Oxide Decomposition and Selective Catalytic Reduction by Methane PDF Download
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Author: Christoforos Kazazis
Publisher:
ISBN:
Category : Decomposition (Chemistry)
Languages : en
Pages : 216
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Author: Christoforos Kazazis
Publisher:
ISBN:
Category : Decomposition (Chemistry)
Languages : en
Pages : 216
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Author: Chee Ming Chong
Publisher:
ISBN:
Category : Catalysis
Languages : en
Pages :
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Author: Masaru Ogura
Publisher:
ISBN:
Category :
Languages : en
Pages : 171
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Author: Enrique Aceves
Publisher:
ISBN:
Category :
Languages : en
Pages : 232
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Author: Zhang Yanping
Publisher:
ISBN:
Category :
Languages : en
Pages : 446
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Author: Jacques C. Vedrine
Publisher: Elsevier
ISBN: 0128116323
Category : Technology & Engineering
Languages : en
Pages : 620
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Book Description
Metal Oxides in Heterogeneous Catalysis is an overview of the past, present and future of heterogeneous catalysis using metal oxides catalysts. The book presents the historical, theoretical, and practical aspects of metal oxide-based heterogeneous catalysis. Metal Oxides in Heterogeneous Catalysis deals with fundamental information on heterogeneous catalysis, including reaction mechanisms and kinetics approaches.There is also a focus on the classification of metal oxides used as catalysts, preparation methods and touches on zeolites, mesoporous materials and Metal-organic frameworks (MOFs) in catalysis. It will touch on acid or base-type reactions, selective (partial) and total oxidation reactions, and enzymatic type reactions The book also touches heavily on the biomass applications of metal oxide catalysts and environmentally related/depollution reactions such as COVs elimination, DeNOx, and DeSOx. Finally, the book also deals with future trends and prospects in metal oxide-based heterogeneous catalysis. - Presents case studies in each chapter that provide a focus on the industrial applications - Includes fundamentals, key theories and practical applications of metal oxide-based heterogeneous catalysis in one comprehensive resource - Edited, and contributed, by leading experts who provide perspectives on synthesis, characterization and applications
Author:
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ISBN:
Category :
Languages : en
Pages : 12
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This project will investigate a suitable catalyst system for the direct NO decomposition, for post-combustion NO. control. The proposed process will not use a reductant, such as ammonia in case of Selective Catalytic Reduction (SCR) process for catalytic reduction of NO(subscript x) to nitrogen. This is a simplified process basically involving passing the flue gas through a catalytic converter, thus avoiding problems generally associated with the commercial Selective Catalytic Reduction (SCR) process, namely high operating cost, ammonia slip, and potential N20 emissions. A brief description of the proposed work is as follows: Catalysts will be prepared by incorporating metal cations into zeolite supports according to ion exchange procedures widely used in preparation of metal/zeolite catalysts. Zeolites will be modified to improve catalytic activity, by blocking ion exchange sites in the small pores of zeolites with promoter cations of high valence. The catalysts of primary interest include copper (Cu), palladium (Pd), platinum (Pt), silver (Ag), and nickel (Ni) exchanged zeolites.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 74
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Author: Haibin Ning
Publisher:
ISBN:
Category : Electronic dissertations
Languages : en
Pages : 0
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The defects-rich cerium oxide (CeO2) supported metal oxide or metal catalysts (Cu, Co, Ni, Fe, Mn and Ru) for catalytic CO2 reduction were studied. For comparison, thermal catalysis, plasma catalysis and electrocatalysis techniques were carried out under various equilibrium and non-equilibrium experimental conditions. The effects of particle morphology, surface modification and reduction treatment on CeO2 supports and supported catalysts were also investigated and discussed to understand the underlying mechanisms in terms of the valence states, surface defects and support-catalyst interaction.A series of surface engineered CeO2 (nanorods, nanocubes, and nanoctahedra) supported metal oxide catalysts were synthesized, characterized and applied to achieve low-temperature and energy-efficient CO2 reduction. The comparison between thermal catalysis under thermodynamic equilibrium conditions and plasma catalysis under non-equilibrium conditions reveals the promotion effect of plasma on the catalytic activity of CO2 hydrogenation with the ionized gas in the plasma region via the formation of highly reactive species (i.e., vibrationally and electronically excited ions and free radicals). The effect of reduction activation treatment was examined that could change the valence states of Ru species and provide alternative reaction pathways for CO2hydrogenation, leading to higher CO2 conversion at low temperature (~95% at 150 oC) under plasma conditions. Furthermore, ~89 % CO2 conversion and ~98 % CH4 selectivity were obtained for surface modified CeO2 nanorods (mCeO2NR) supported RuOx catalysts at 150 oC, companied with excellent stability (~87 % CO2 conversion at 350 oC). Applying surface modification on the CeO2 surface generates more surface defects (oxygen vacancy, voids, and steps, etc.) as anchoring sites for Ru species and increases the thermal stability of catalyst clusters.Additionally, electrocatalytic conversion of CO2 was conducted at room temperature under atmospheric pressure with CeO2 doped RuOx catalyst films. Different CeO2 nanocrystals including pristine CeO2NR, mCeO2NR, CeO2 nanocubes (CeO2NC) and CeO2 nanoctahedra (CeO2NO) were doped into RuOx and the mCeO2NR-RuOx thin film was found to present the highest current density (166 mA/cm2 at -1.6 V vs RHE.) with the highest double-layer capacitance (100 mF/cm2) and lowest resistance from the linear sweep voltammetry (LSV), electrochemical impedance spectroscopy (EIS) and cyclic voltammetry results.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 20
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